First Law of Thermodynamics
CHXI06:THERMODYNAMICS

369386 20 moles of an ideal gas expand isothermally and reversibly from a pressure of \(\mathrm{5 \mathrm{~atm}}\) to 1 atm at \(\mathrm{300 \mathrm{~K}}\). Calculate the largest mass that can be lifted through a height of 1 metre by this expansion.

1 \(\mathrm{4092.76 \mathrm{~kg}}\)
2 \(\mathrm{8730.93 \mathrm{~kg}}\)
3 \(\mathrm{4492.76 \mathrm{~kg}}\)
4 \(\mathrm{8205.23 \mathrm{~kg}}\)
CHXI06:THERMODYNAMICS

369387 An ideal gas expands isothermally and reversibly from \(\mathrm{10 \mathrm{~m}^{3}}\) to \(\mathrm{20 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), performing \(\mathrm{5.187 \mathrm{~kJ}}\) of work on surrounding, Calculate number of moles of gas used.

1 1
2 3
3 1.5
4 2
CHXI06:THERMODYNAMICS

369388 A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is \(\mathrm{5 \mathrm{~J}}\) and \(\mathrm{8 \mathrm{~J}}\), respectively. Now gas is brought back to A by another process during which \(\mathrm{3 \mathrm{~J}}\) of heat is evolved. In this reverse process of \(\mathrm{\mathrm{B}}\) to \(\mathrm{\mathrm{A}}\).

1 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the gas.
2 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the gas.
3 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the surrounding on gas.
4 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the surrounding on gas
CHXI06:THERMODYNAMICS

369389 Which of the following statements/relationships is not correct in thermodynamics changes?

1 \(\mathrm{\Delta U=0}\) (isothermal reversible expansion of a gas)
2 \(\mathrm{w=-n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
3 \(\mathrm{w=n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
4 For a system of constant volume heat involved directly changes to internal energy.
CHXI06:THERMODYNAMICS

369386 20 moles of an ideal gas expand isothermally and reversibly from a pressure of \(\mathrm{5 \mathrm{~atm}}\) to 1 atm at \(\mathrm{300 \mathrm{~K}}\). Calculate the largest mass that can be lifted through a height of 1 metre by this expansion.

1 \(\mathrm{4092.76 \mathrm{~kg}}\)
2 \(\mathrm{8730.93 \mathrm{~kg}}\)
3 \(\mathrm{4492.76 \mathrm{~kg}}\)
4 \(\mathrm{8205.23 \mathrm{~kg}}\)
CHXI06:THERMODYNAMICS

369387 An ideal gas expands isothermally and reversibly from \(\mathrm{10 \mathrm{~m}^{3}}\) to \(\mathrm{20 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), performing \(\mathrm{5.187 \mathrm{~kJ}}\) of work on surrounding, Calculate number of moles of gas used.

1 1
2 3
3 1.5
4 2
CHXI06:THERMODYNAMICS

369388 A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is \(\mathrm{5 \mathrm{~J}}\) and \(\mathrm{8 \mathrm{~J}}\), respectively. Now gas is brought back to A by another process during which \(\mathrm{3 \mathrm{~J}}\) of heat is evolved. In this reverse process of \(\mathrm{\mathrm{B}}\) to \(\mathrm{\mathrm{A}}\).

1 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the gas.
2 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the gas.
3 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the surrounding on gas.
4 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the surrounding on gas
CHXI06:THERMODYNAMICS

369389 Which of the following statements/relationships is not correct in thermodynamics changes?

1 \(\mathrm{\Delta U=0}\) (isothermal reversible expansion of a gas)
2 \(\mathrm{w=-n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
3 \(\mathrm{w=n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
4 For a system of constant volume heat involved directly changes to internal energy.
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CHXI06:THERMODYNAMICS

369386 20 moles of an ideal gas expand isothermally and reversibly from a pressure of \(\mathrm{5 \mathrm{~atm}}\) to 1 atm at \(\mathrm{300 \mathrm{~K}}\). Calculate the largest mass that can be lifted through a height of 1 metre by this expansion.

1 \(\mathrm{4092.76 \mathrm{~kg}}\)
2 \(\mathrm{8730.93 \mathrm{~kg}}\)
3 \(\mathrm{4492.76 \mathrm{~kg}}\)
4 \(\mathrm{8205.23 \mathrm{~kg}}\)
CHXI06:THERMODYNAMICS

369387 An ideal gas expands isothermally and reversibly from \(\mathrm{10 \mathrm{~m}^{3}}\) to \(\mathrm{20 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), performing \(\mathrm{5.187 \mathrm{~kJ}}\) of work on surrounding, Calculate number of moles of gas used.

1 1
2 3
3 1.5
4 2
CHXI06:THERMODYNAMICS

369388 A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is \(\mathrm{5 \mathrm{~J}}\) and \(\mathrm{8 \mathrm{~J}}\), respectively. Now gas is brought back to A by another process during which \(\mathrm{3 \mathrm{~J}}\) of heat is evolved. In this reverse process of \(\mathrm{\mathrm{B}}\) to \(\mathrm{\mathrm{A}}\).

1 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the gas.
2 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the gas.
3 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the surrounding on gas.
4 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the surrounding on gas
CHXI06:THERMODYNAMICS

369389 Which of the following statements/relationships is not correct in thermodynamics changes?

1 \(\mathrm{\Delta U=0}\) (isothermal reversible expansion of a gas)
2 \(\mathrm{w=-n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
3 \(\mathrm{w=n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
4 For a system of constant volume heat involved directly changes to internal energy.
CHXI06:THERMODYNAMICS

369386 20 moles of an ideal gas expand isothermally and reversibly from a pressure of \(\mathrm{5 \mathrm{~atm}}\) to 1 atm at \(\mathrm{300 \mathrm{~K}}\). Calculate the largest mass that can be lifted through a height of 1 metre by this expansion.

1 \(\mathrm{4092.76 \mathrm{~kg}}\)
2 \(\mathrm{8730.93 \mathrm{~kg}}\)
3 \(\mathrm{4492.76 \mathrm{~kg}}\)
4 \(\mathrm{8205.23 \mathrm{~kg}}\)
CHXI06:THERMODYNAMICS

369387 An ideal gas expands isothermally and reversibly from \(\mathrm{10 \mathrm{~m}^{3}}\) to \(\mathrm{20 \mathrm{~m}^{3}}\) at \(\mathrm{300 \mathrm{~K}}\), performing \(\mathrm{5.187 \mathrm{~kJ}}\) of work on surrounding, Calculate number of moles of gas used.

1 1
2 3
3 1.5
4 2
CHXI06:THERMODYNAMICS

369388 A gas undergoes change from state A to state B. In this process, the heat absorbed and work done by the gas is \(\mathrm{5 \mathrm{~J}}\) and \(\mathrm{8 \mathrm{~J}}\), respectively. Now gas is brought back to A by another process during which \(\mathrm{3 \mathrm{~J}}\) of heat is evolved. In this reverse process of \(\mathrm{\mathrm{B}}\) to \(\mathrm{\mathrm{A}}\).

1 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the gas.
2 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the gas.
3 \(\mathrm{10 \mathrm{~J}}\) of the work will be done by the surrounding on gas.
4 \(\mathrm{6 \mathrm{~J}}\) of the work will be done by the surrounding on gas
CHXI06:THERMODYNAMICS

369389 Which of the following statements/relationships is not correct in thermodynamics changes?

1 \(\mathrm{\Delta U=0}\) (isothermal reversible expansion of a gas)
2 \(\mathrm{w=-n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
3 \(\mathrm{w=n R T \ln \dfrac{V_{2}}{V_{1}}}\) (isothermal reversible expansion of an ideal gas)
4 For a system of constant volume heat involved directly changes to internal energy.